git.sesse.net Git - mlt/blob - src/modules/sdl/consumer_sdl.c

   1 /*
   2  * consumer_sdl.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004, 2010 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_consumer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <framework/mlt_filter.h>
  26 #include <framework/mlt_log.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <pthread.h>
  31 #include <SDL.h>
  32 #include <SDL_syswm.h>
  33 #include <sys/time.h>
  34 #include "consumer_sdl_osx.h"
  35
  36 extern pthread_mutex_t mlt_sdl_mutex;
  37
  38 /** This classes definition.
  39 */
  40
  41 typedef struct consumer_sdl_s *consumer_sdl;
  42
  43 struct consumer_sdl_s
  44 {
  45         struct mlt_consumer_s parent;
  46         mlt_properties properties;
  47         mlt_deque queue;
  48         pthread_t thread;
  49         int joined;
  50         int running;
  51         uint8_t audio_buffer[ 4096 * 10 ];
  52         int audio_avail;
  53         pthread_mutex_t audio_mutex;
  54         pthread_cond_t audio_cond;
  55         pthread_mutex_t video_mutex;
  56         pthread_cond_t video_cond;
  57         int window_width;
  58         int window_height;
  59         int previous_width;
  60         int previous_height;
  61         int width;
  62         int height;
  63         int playing;
  64         int sdl_flags;
  65         SDL_Overlay *sdl_overlay;
  66         SDL_Rect rect;
  67         uint8_t *buffer;
  68         int bpp;
  69 };
  70
  71 /** Forward references to static functions.
  72 */
  73
  74 static int consumer_start( mlt_consumer parent );
  75 static int consumer_stop( mlt_consumer parent );
  76 static int consumer_is_stopped( mlt_consumer parent );
  77 static void consumer_close( mlt_consumer parent );
  78 static void *consumer_thread( void * );
  79 static int consumer_get_dimensions( int *width, int *height );
  80 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service self, void **args );
  81
  82 /** This is what will be called by the factory - anything can be passed in
  83         via the argument, but keep it simple.
  84 */
  85
  86 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  87 {
  88         // Create the consumer object
  89         consumer_sdl self = calloc( 1, sizeof( struct consumer_sdl_s ) );
  90
  91         // If no malloc'd and consumer init ok
  92         if ( self != NULL && mlt_consumer_init( &self->parent, self, profile ) == 0 )
  93         {
  94                 // Create the queue
  95                 self->queue = mlt_deque_init( );
  96
  97                 // Get the parent consumer object
  98                 mlt_consumer parent = &self->parent;
  99
 100                 // We have stuff to clean up, so override the close method
 101                 parent->close = consumer_close;
 102
 103                 // get a handle on properties
 104                 mlt_service service = MLT_CONSUMER_SERVICE( parent );
 105                 self->properties = MLT_SERVICE_PROPERTIES( service );
 106
 107                 // Set the default volume
 108                 mlt_properties_set_double( self->properties, "volume", 1.0 );
 109
 110                 // This is the initialisation of the consumer
 111                 pthread_mutex_init( &self->audio_mutex, NULL );
 112                 pthread_cond_init( &self->audio_cond, NULL);
 113                 pthread_mutex_init( &self->video_mutex, NULL );
 114                 pthread_cond_init( &self->video_cond, NULL);
 115
 116                 // Default scaler (for now we'll use nearest)
 117                 mlt_properties_set( self->properties, "rescale", "nearest" );
 118                 mlt_properties_set( self->properties, "deinterlace_method", "onefield" );
 119                 mlt_properties_set_int( self->properties, "top_field_first", -1 );
 120
 121                 // Default buffer for low latency
 122                 mlt_properties_set_int( self->properties, "buffer", 1 );
 123
 124                 // Default audio buffer
 125                 mlt_properties_set_int( self->properties, "audio_buffer", 2048 );
 126
 127                 // Ensure we don't join on a non-running object
 128                 self->joined = 1;
 129
 130                 // process actual param
 131                 if ( arg && sscanf( arg, "%dx%d", &self->width, &self->height ) )
 132                 {
 133                         mlt_properties_set_int( self->properties, "_arg_size", 1 );
 134                 }
 135                 else
 136                 {
 137                         self->width = mlt_properties_get_int( self->properties, "width" );
 138                         self->height = mlt_properties_get_int( self->properties, "height" );
 139                 }
 140
 141                 // Set the sdl flags
 142                 self->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_DOUBLEBUF;
 143 #if !defined(__DARWIN__)
 144                 self->sdl_flags |= SDL_RESIZABLE;
 145 #endif
 146                 // Allow thread to be started/stopped
 147                 parent->start = consumer_start;
 148                 parent->stop = consumer_stop;
 149                 parent->is_stopped = consumer_is_stopped;
 150
 151                 // Register specific events
 152                 mlt_events_register( self->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
 153
 154                 // Return the consumer produced
 155                 return parent;
 156         }
 157
 158         // malloc or consumer init failed
 159         free( self );
 160
 161         // Indicate failure
 162         return NULL;
 163 }
 164
 165 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service self, void **args )
 166 {
 167         if ( listener != NULL )
 168                 listener( owner, self, ( SDL_Event * )args[ 0 ] );
 169 }
 170
 171 int consumer_start( mlt_consumer parent )
 172 {
 173         consumer_sdl self = parent->child;
 174
 175         if ( !self->running )
 176         {
 177                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 178                 int video_off = mlt_properties_get_int( properties, "video_off" );
 179                 int preview_off = mlt_properties_get_int( properties, "preview_off" );
 180                 int display_off = video_off | preview_off;
 181                 int audio_off = mlt_properties_get_int( properties, "audio_off" );
 182                 int sdl_started = mlt_properties_get_int( properties, "sdl_started" );
 183                 char *output_display = mlt_properties_get( properties, "output_display" );
 184                 char *window_id = mlt_properties_get( properties, "window_id" );
 185                 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
 186                 char *video_driver = mlt_properties_get( properties, "video_driver" );
 187                 char *audio_device = mlt_properties_get( properties, "audio_device" );
 188
 189                 consumer_stop( parent );
 190
 191                 self->running = 1;
 192                 self->joined = 0;
 193
 194                 if ( output_display != NULL )
 195                         setenv( "DISPLAY", output_display, 1 );
 196
 197                 if ( window_id != NULL )
 198                         setenv( "SDL_WINDOWID", window_id, 1 );
 199
 200                 if ( video_driver != NULL )
 201                         setenv( "SDL_VIDEODRIVER", video_driver, 1 );
 202
 203                 if ( audio_driver != NULL )
 204                         setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
 205
 206                 if ( audio_device != NULL )
 207                         setenv( "AUDIODEV", audio_device, 1 );
 208
 209                 if ( ! mlt_properties_get_int( self->properties, "_arg_size" ) )
 210                 {
 211                         if ( mlt_properties_get_int( self->properties, "width" ) > 0 )
 212                                 self->width = mlt_properties_get_int( self->properties, "width" );
 213                         if ( mlt_properties_get_int( self->properties, "height" ) > 0 )
 214                                 self->height = mlt_properties_get_int( self->properties, "height" );
 215                 }
 216
 217                 self->bpp = mlt_properties_get_int( self->properties, "bpp" );
 218
 219                 if ( sdl_started == 0 && display_off == 0 )
 220                 {
 221                         pthread_mutex_lock( &mlt_sdl_mutex );
 222                         int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 223                         pthread_mutex_unlock( &mlt_sdl_mutex );
 224                         if ( ret < 0 )
 225                         {
 226                                 mlt_log_error( MLT_CONSUMER_SERVICE(parent), "Failed to initialize SDL: %s\n", SDL_GetError() );
 227                                 return -1;
 228                         }
 229
 230                         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 231                         SDL_EnableUNICODE( 1 );
 232                 }
 233
 234                 if ( audio_off == 0 )
 235                         SDL_InitSubSystem( SDL_INIT_AUDIO );
 236
 237                 // Default window size
 238                 if ( mlt_properties_get_int( self->properties, "_arg_size" ) )
 239                 {
 240                         self->window_width = self->width;
 241                         self->window_height = self->height;
 242                 }
 243                 else
 244                 {
 245                         double display_ratio = mlt_properties_get_double( self->properties, "display_ratio" );
 246                         self->window_width = ( double )self->height * display_ratio + 0.5;
 247                         self->window_height = self->height;
 248                 }
 249
 250                 pthread_mutex_lock( &mlt_sdl_mutex );
 251                 if ( !SDL_GetVideoSurface() && display_off == 0 )
 252                 {
 253                         if ( mlt_properties_get_int( self->properties, "fullscreen" ) )
 254                         {
 255                                 const SDL_VideoInfo *vi;
 256                                 pthread_mutex_lock( &mlt_sdl_mutex );
 257                                 vi = SDL_GetVideoInfo();
 258                                 pthread_mutex_unlock( &mlt_sdl_mutex );
 259                                 self->window_width = vi->current_w;
 260                                 self->window_height = vi->current_h;
 261                                 self->sdl_flags |= SDL_FULLSCREEN;
 262                                 SDL_ShowCursor( SDL_DISABLE );
 263                         }
 264                         SDL_SetVideoMode( self->window_width, self->window_height, 0, self->sdl_flags );
 265                 }
 266                 pthread_mutex_unlock( &mlt_sdl_mutex );
 267
 268                 pthread_create( &self->thread, NULL, consumer_thread, self );
 269         }
 270
 271         return 0;
 272 }
 273
 274 int consumer_stop( mlt_consumer parent )
 275 {
 276         // Get the actual object
 277         consumer_sdl self = parent->child;
 278
 279         if ( self->joined == 0 )
 280         {
 281                 // Kill the thread and clean up
 282                 self->joined = 1;
 283                 self->running = 0;
 284 #ifndef WIN32
 285                 if ( self->thread )
 286 #endif
 287                         pthread_join( self->thread, NULL );
 288
 289                 // internal cleanup
 290                 if ( self->sdl_overlay != NULL )
 291                         SDL_FreeYUVOverlay( self->sdl_overlay );
 292                 self->sdl_overlay = NULL;
 293
 294                 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
 295                 {
 296                         pthread_mutex_lock( &self->audio_mutex );
 297                         pthread_cond_broadcast( &self->audio_cond );
 298                         pthread_mutex_unlock( &self->audio_mutex );
 299                         SDL_QuitSubSystem( SDL_INIT_AUDIO );
 300                 }
 301
 302                 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
 303                 {
 304                         pthread_mutex_lock( &mlt_sdl_mutex );
 305                         SDL_Quit( );
 306                         pthread_mutex_unlock( &mlt_sdl_mutex );
 307                 }
 308         }
 309
 310         return 0;
 311 }
 312
 313 int consumer_is_stopped( mlt_consumer parent )
 314 {
 315         consumer_sdl self = parent->child;
 316         return !self->running;
 317 }
 318
 319 static int sdl_lock_display( )
 320 {
 321         pthread_mutex_lock( &mlt_sdl_mutex );
 322         SDL_Surface *screen = SDL_GetVideoSurface( );
 323         int result = screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 324         pthread_mutex_unlock( &mlt_sdl_mutex );
 325         return result;
 326 }
 327
 328 static void sdl_unlock_display( )
 329 {
 330         pthread_mutex_lock( &mlt_sdl_mutex );
 331         SDL_Surface *screen = SDL_GetVideoSurface( );
 332         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 333                 SDL_UnlockSurface( screen );
 334         pthread_mutex_unlock( &mlt_sdl_mutex );
 335 }
 336
 337 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 338 {
 339         consumer_sdl self = udata;
 340
 341         // Get the volume
 342         double volume = mlt_properties_get_double( self->properties, "volume" );
 343
 344         pthread_mutex_lock( &self->audio_mutex );
 345
 346         // Block until audio received
 347         while ( self->running && len > self->audio_avail )
 348                 pthread_cond_wait( &self->audio_cond, &self->audio_mutex );
 349
 350         if ( self->audio_avail >= len )
 351         {
 352                 // Place in the audio buffer
 353                 if ( volume != 1.0 )
 354                         SDL_MixAudio( stream, self->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 355                 else
 356                         memcpy( stream, self->audio_buffer, len );
 357
 358                 // Remove len from the audio available
 359                 self->audio_avail -= len;
 360
 361                 // Remove the samples
 362                 memmove( self->audio_buffer, self->audio_buffer + len, self->audio_avail );
 363         }
 364         else
 365         {
 366                 // Just to be safe, wipe the stream first
 367                 memset( stream, 0, len );
 368
 369                 // Mix the audio
 370                 SDL_MixAudio( stream, self->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 371
 372                 // No audio left
 373                 self->audio_avail = 0;
 374         }
 375
 376         // We're definitely playing now
 377         self->playing = 1;
 378
 379         pthread_cond_broadcast( &self->audio_cond );
 380         pthread_mutex_unlock( &self->audio_mutex );
 381 }
 382
 383 static int consumer_play_audio( consumer_sdl self, mlt_frame frame, int init_audio, int *duration )
 384 {
 385         // Get the properties of self consumer
 386         mlt_properties properties = self->properties;
 387         mlt_audio_format afmt = mlt_audio_s16;
 388
 389         // Set the preferred params of the test card signal
 390         int channels = mlt_properties_get_int( properties, "channels" );
 391         int dest_channels = channels;
 392         int frequency = mlt_properties_get_int( properties, "frequency" );
 393         static int counter = 0;
 394
 395         int samples = mlt_sample_calculator( mlt_properties_get_double( self->properties, "fps" ), frequency, counter++ );
 396
 397         int16_t *pcm;
 398         int bytes;
 399
 400         mlt_frame_get_audio( frame, (void**) &pcm, &afmt, &frequency, &channels, &samples );
 401         *duration = ( ( samples * 1000 ) / frequency );
 402         pcm += mlt_properties_get_int( properties, "audio_offset" );
 403
 404         if ( mlt_properties_get_int( properties, "audio_off" ) )
 405         {
 406                 self->playing = 1;
 407                 init_audio = 1;
 408                 return init_audio;
 409         }
 410
 411         if ( init_audio == 1 )
 412         {
 413                 SDL_AudioSpec request;
 414                 SDL_AudioSpec got;
 415
 416                 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
 417
 418                 // specify audio format
 419                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 420                 self->playing = 0;
 421                 request.freq = frequency;
 422                 request.format = AUDIO_S16SYS;
 423                 request.channels = dest_channels;
 424                 request.samples = audio_buffer;
 425                 request.callback = sdl_fill_audio;
 426                 request.userdata = (void *)self;
 427                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 428                 {
 429                         mlt_log_error( MLT_CONSUMER_SERVICE( self ), "SDL failed to open audio: %s\n", SDL_GetError() );
 430                         init_audio = 2;
 431                 }
 432                 else if ( got.size != 0 )
 433                 {
 434                         SDL_PauseAudio( 0 );
 435                         init_audio = 0;
 436                 }
 437         }
 438
 439         if ( init_audio == 0 )
 440         {
 441                 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 442
 443                 bytes = samples * dest_channels * sizeof(*pcm);
 444                 pthread_mutex_lock( &self->audio_mutex );
 445                 while ( self->running && bytes > ( sizeof( self->audio_buffer) - self->audio_avail ) )
 446                         pthread_cond_wait( &self->audio_cond, &self->audio_mutex );
 447                 if ( self->running )
 448                 {
 449                         if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 450                         {
 451                                 if ( channels == dest_channels )
 452                                 {
 453                                         memcpy( &self->audio_buffer[ self->audio_avail ], pcm, bytes );
 454                                 }
 455                                 else
 456                                 {
 457                                         int16_t *dest = (int16_t*) &self->audio_buffer[ self->audio_avail ];
 458                                         int i = samples + 1;
 459
 460                                         while ( --i )
 461                                         {
 462                                                 memcpy( dest, pcm, dest_channels * sizeof(*pcm) );
 463                                                 pcm += channels;
 464                                                 dest += dest_channels;
 465                                         }
 466                                 }
 467                         }
 468                         else
 469                         {
 470                                 memset( &self->audio_buffer[ self->audio_avail ], 0, bytes );
 471                         }
 472                         self->audio_avail += bytes;
 473                 }
 474                 pthread_cond_broadcast( &self->audio_cond );
 475                 pthread_mutex_unlock( &self->audio_mutex );
 476         }
 477         else
 478         {
 479                 self->playing = 1;
 480         }
 481
 482         return init_audio;
 483 }
 484
 485 static int consumer_play_video( consumer_sdl self, mlt_frame frame )
 486 {
 487         // Get the properties of this consumer
 488         mlt_properties properties = self->properties;
 489
 490         mlt_image_format vfmt = mlt_image_yuv422;
 491         int width = self->width, height = self->height;
 492         uint8_t *image;
 493         int changed = 0;
 494
 495         int video_off = mlt_properties_get_int( properties, "video_off" );
 496         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 497         mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
 498         int display_off = video_off | preview_off;
 499
 500         if ( self->running && display_off == 0 )
 501         {
 502                 // Get the image, width and height
 503                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 504
 505                 void *pool = mlt_cocoa_autorelease_init();
 506
 507                 // Handle events
 508                 if ( SDL_GetVideoSurface() )
 509                 {
 510                         SDL_Event event;
 511
 512                         sdl_lock_display( );
 513                         pthread_mutex_lock( &mlt_sdl_mutex );
 514                         changed = consumer_get_dimensions( &self->window_width, &self->window_height );
 515                         pthread_mutex_unlock( &mlt_sdl_mutex );
 516                         sdl_unlock_display( );
 517
 518                         while ( SDL_PollEvent( &event ) )
 519                         {
 520                                 mlt_events_fire( self->properties, "consumer-sdl-event", &event, NULL );
 521
 522                                 switch( event.type )
 523                                 {
 524                                         case SDL_VIDEORESIZE:
 525                                                 self->window_width = event.resize.w;
 526                                                 self->window_height = event.resize.h;
 527                                                 changed = 1;
 528                                                 break;
 529                                         case SDL_QUIT:
 530                                                 self->running = 0;
 531                                                 break;
 532                                         case SDL_KEYDOWN:
 533                                                 {
 534                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 535                                                         char keyboard[ 2 ] = " ";
 536                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 537                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 538                                                         {
 539                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 540                                                                 callback( producer, keyboard );
 541                                                         }
 542                                                 }
 543                                                 break;
 544                                 }
 545                         }
 546                 }
 547
 548                 sdl_lock_display();
 549
 550                 if ( width != self->width || height != self->height )
 551                 {
 552                         if ( self->sdl_overlay != NULL )
 553                                 SDL_FreeYUVOverlay( self->sdl_overlay );
 554                         self->sdl_overlay = NULL;
 555                 }
 556
 557                 if ( self->running && ( !SDL_GetVideoSurface() || changed ) )
 558                 {
 559                         // Force an overlay recreation
 560                         if ( self->sdl_overlay != NULL )
 561                                 SDL_FreeYUVOverlay( self->sdl_overlay );
 562                         self->sdl_overlay = NULL;
 563
 564                         // open SDL window with video overlay, if possible
 565                         pthread_mutex_lock( &mlt_sdl_mutex );
 566                         SDL_Surface *screen = SDL_SetVideoMode( self->window_width, self->window_height, self->bpp, self->sdl_flags );
 567                         if ( consumer_get_dimensions( &self->window_width, &self->window_height ) )
 568                                 screen = SDL_SetVideoMode( self->window_width, self->window_height, self->bpp, self->sdl_flags );
 569                         pthread_mutex_unlock( &mlt_sdl_mutex );
 570
 571                         if ( screen )
 572                         {
 573                                 uint32_t color = mlt_properties_get_int( self->properties, "window_background" );
 574                                 SDL_FillRect( screen, NULL, color >> 8 );
 575                                 SDL_Flip( screen );
 576                         }
 577                 }
 578
 579                 if ( self->running )
 580                 {
 581                         // Determine window's new display aspect ratio
 582                         double this_aspect = ( double )self->window_width / self->window_height;
 583
 584                         // Get the display aspect ratio
 585                         double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
 586
 587                         // Determine frame's display aspect ratio
 588                         double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
 589
 590                         // Store the width and height received
 591                         self->width = width;
 592                         self->height = height;
 593
 594                         // If using hardware scaler
 595                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 596                                 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 597                         {
 598                                 // Use hardware scaler to normalise display aspect ratio
 599                                 self->rect.w = frame_aspect / this_aspect * self->window_width;
 600                                 self->rect.h = self->window_height;
 601                                 if ( self->rect.w > self->window_width )
 602                                 {
 603                                         self->rect.w = self->window_width;
 604                                         self->rect.h = this_aspect / frame_aspect * self->window_height;
 605                                 }
 606                         }
 607                         // Special case optimisation to negate odd effect of sample aspect ratio
 608                         // not corresponding exactly with image resolution.
 609                         else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
 610                         {
 611                                 self->rect.w = self->window_width;
 612                                 self->rect.h = self->window_height;
 613                         }
 614                         // Use hardware scaler to normalise sample aspect ratio
 615                         else if ( self->window_height * display_ratio > self->window_width )
 616                         {
 617                                 self->rect.w = self->window_width;
 618                                 self->rect.h = self->window_width / display_ratio;
 619                         }
 620                         else
 621                         {
 622                                 self->rect.w = self->window_height * display_ratio;
 623                                 self->rect.h = self->window_height;
 624                         }
 625
 626                         self->rect.x = ( self->window_width - self->rect.w ) / 2;
 627                         self->rect.y = ( self->window_height - self->rect.h ) / 2;
 628                         self->rect.x -= self->rect.x % 2;
 629
 630                         mlt_properties_set_int( self->properties, "rect_x", self->rect.x );
 631                         mlt_properties_set_int( self->properties, "rect_y", self->rect.y );
 632                         mlt_properties_set_int( self->properties, "rect_w", self->rect.w );
 633                         mlt_properties_set_int( self->properties, "rect_h", self->rect.h );
 634
 635                         SDL_SetClipRect( SDL_GetVideoSurface(), &self->rect );
 636                 }
 637
 638                 if ( self->running && SDL_GetVideoSurface() && self->sdl_overlay == NULL )
 639                 {
 640                         SDL_SetClipRect( SDL_GetVideoSurface(), &self->rect );
 641                         self->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, SDL_GetVideoSurface() );
 642                 }
 643
 644                 if ( self->running && SDL_GetVideoSurface() && self->sdl_overlay != NULL )
 645                 {
 646                         self->buffer = self->sdl_overlay->pixels[ 0 ];
 647                         if ( SDL_LockYUVOverlay( self->sdl_overlay ) >= 0 )
 648                         {
 649                                 if ( image != NULL )
 650                                         memcpy( self->buffer, image, width * height * 2 );
 651                                 SDL_UnlockYUVOverlay( self->sdl_overlay );
 652                                 SDL_DisplayYUVOverlay( self->sdl_overlay, &SDL_GetVideoSurface()->clip_rect );
 653                         }
 654                 }
 655
 656                 sdl_unlock_display();
 657                 mlt_cocoa_autorelease_close( pool );
 658                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 659         }
 660         else if ( self->running )
 661         {
 662                 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
 663                 if ( !video_off )
 664                         mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 665                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 666         }
 667
 668         return 0;
 669 }
 670
 671 static void *video_thread( void *arg )
 672 {
 673         // Identify the arg
 674         consumer_sdl self = arg;
 675
 676         // Obtain time of thread start
 677         struct timeval now;
 678         int64_t start = 0;
 679         int64_t elapsed = 0;
 680         struct timespec tm;
 681         mlt_frame next = NULL;
 682         mlt_properties properties = NULL;
 683         double speed = 0;
 684
 685         // Get real time flag
 686         int real_time = mlt_properties_get_int( self->properties, "real_time" );
 687
 688         // Get the current time
 689         gettimeofday( &now, NULL );
 690
 691         // Determine start time
 692         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 693
 694         while ( self->running )
 695         {
 696                 // Pop the next frame
 697                 pthread_mutex_lock( &self->video_mutex );
 698                 next = mlt_deque_pop_front( self->queue );
 699                 while ( next == NULL && self->running )
 700                 {
 701                         pthread_cond_wait( &self->video_cond, &self->video_mutex );
 702                         next = mlt_deque_pop_front( self->queue );
 703                 }
 704                 pthread_mutex_unlock( &self->video_mutex );
 705
 706                 if ( !self->running || next == NULL ) break;
 707
 708                 // Get the properties
 709                 properties =  MLT_FRAME_PROPERTIES( next );
 710
 711                 // Get the speed of the frame
 712                 speed = mlt_properties_get_double( properties, "_speed" );
 713
 714                 // Get the current time
 715                 gettimeofday( &now, NULL );
 716
 717                 // Get the elapsed time
 718                 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
 719
 720                 // See if we have to delay the display of the current frame
 721                 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && self->running )
 722                 {
 723                         // Obtain the scheduled playout time
 724                         int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
 725
 726                         // Determine the difference between the elapsed time and the scheduled playout time
 727                         int64_t difference = scheduled - elapsed;
 728
 729                         // Smooth playback a bit
 730                         if ( real_time && ( difference > 20000 && speed == 1.0 ) )
 731                         {
 732                                 tm.tv_sec = difference / 1000000;
 733                                 tm.tv_nsec = ( difference % 1000000 ) * 500;
 734                                 nanosleep( &tm, NULL );
 735                         }
 736
 737                         // Show current frame if not too old
 738                         if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( self->queue ) < 2 ) )
 739                                 consumer_play_video( self, next );
 740
 741                         // If the queue is empty, recalculate start to allow build up again
 742                         if ( real_time && ( mlt_deque_count( self->queue ) == 0 && speed == 1.0 ) )
 743                         {
 744                                 gettimeofday( &now, NULL );
 745                                 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
 746                         }
 747                 }
 748                 else
 749                 {
 750                         static int dropped = 0;
 751                         mlt_log_info( MLT_CONSUMER_SERVICE(&self->parent), "dropped video frame %d\n", ++dropped );
 752                 }
 753
 754                 // This frame can now be closed
 755                 mlt_frame_close( next );
 756                 next = NULL;
 757         }
 758
 759         if ( next != NULL )
 760                 mlt_frame_close( next );
 761
 762         mlt_consumer_stopped( &self->parent );
 763
 764         return NULL;
 765 }
 766
 767 /** Threaded wrapper for pipe.
 768 */
 769
 770 static void *consumer_thread( void *arg )
 771 {
 772         // Identify the arg
 773         consumer_sdl self = arg;
 774
 775         // Get the consumer
 776         mlt_consumer consumer = &self->parent;
 777
 778         // Convenience functionality
 779         int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
 780         int terminated = 0;
 781
 782         // Video thread
 783         pthread_t thread;
 784
 785         // internal intialization
 786         int init_audio = 1;
 787         int init_video = 1;
 788         mlt_frame frame = NULL;
 789         int duration = 0;
 790         int64_t playtime = 0;
 791         struct timespec tm = { 0, 100000 };
 792
 793         // Loop until told not to
 794         while( self->running )
 795         {
 796                 // Get a frame from the attached producer
 797                 frame = !terminated? mlt_consumer_rt_frame( consumer ) : NULL;
 798
 799                 // Check for termination
 800                 if ( terminate_on_pause && frame )
 801                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 802
 803                 // Ensure that we have a frame
 804                 if ( frame )
 805                 {
 806                         // Play audio
 807                         init_audio = consumer_play_audio( self, frame, init_audio, &duration );
 808
 809                         // Determine the start time now
 810                         if ( self->playing && init_video )
 811                         {
 812                                 // Create the video thread
 813                                 pthread_create( &thread, NULL, video_thread, self );
 814
 815                                 // Video doesn't need to be initialised any more
 816                                 init_video = 0;
 817                         }
 818
 819                         // Set playtime for this frame
 820                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "playtime", playtime );
 821
 822                         while ( self->running && mlt_deque_count( self->queue ) > 15 )
 823                                 nanosleep( &tm, NULL );
 824
 825                         // Push this frame to the back of the queue
 826                         pthread_mutex_lock( &self->video_mutex );
 827                         mlt_deque_push_back( self->queue, frame );
 828                         pthread_cond_broadcast( &self->video_cond );
 829                         pthread_mutex_unlock( &self->video_mutex );
 830
 831                         // Calculate the next playtime
 832                         playtime += ( duration * 1000 );
 833                 }
 834                 else if ( terminated )
 835                 {
 836                         if ( init_video || mlt_deque_count( self->queue ) == 0 )
 837                                 break;
 838                         else
 839                                 nanosleep( &tm, NULL );
 840                 }
 841         }
 842
 843         self->running = 0;
 844
 845         // Unblock sdl_preview
 846         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "put_mode" ) == 1 )
 847         {
 848                 frame = mlt_consumer_get_frame( consumer );
 849                 if ( frame )
 850                         mlt_frame_close( frame );
 851                 frame = NULL;
 852         }
 853
 854         // Kill the video thread
 855         if ( init_video == 0 )
 856         {
 857                 pthread_mutex_lock( &self->video_mutex );
 858                 pthread_cond_broadcast( &self->video_cond );
 859                 pthread_mutex_unlock( &self->video_mutex );
 860                 pthread_join( thread, NULL );
 861         }
 862
 863         while( mlt_deque_count( self->queue ) )
 864                 mlt_frame_close( mlt_deque_pop_back( self->queue ) );
 865
 866         self->audio_avail = 0;
 867
 868         return NULL;
 869 }
 870
 871 static int consumer_get_dimensions( int *width, int *height )
 872 {
 873         int changed = 0;
 874
 875         // SDL windows manager structure
 876         SDL_SysWMinfo wm;
 877
 878         // Specify the SDL Version
 879         SDL_VERSION( &wm.version );
 880
 881         // Lock the display
 882         //sdl_lock_display();
 883
 884 #ifndef __DARWIN__
 885         // Get the wm structure
 886         if ( SDL_GetWMInfo( &wm ) == 1 )
 887         {
 888 #ifndef WIN32
 889                 // Check that we have the X11 wm
 890                 if ( wm.subsystem == SDL_SYSWM_X11 )
 891                 {
 892                         // Get the SDL window
 893                         Window window = wm.info.x11.window;
 894
 895                         // Get the display session
 896                         Display *display = wm.info.x11.display;
 897
 898                         // Get the window attributes
 899                         XWindowAttributes attr;
 900                         XGetWindowAttributes( display, window, &attr );
 901
 902                         // Determine whether window has changed
 903                         changed = *width != attr.width || *height != attr.height;
 904
 905                         // Return width and height
 906                         *width = attr.width;
 907                         *height = attr.height;
 908                 }
 909 #endif
 910         }
 911 #endif
 912
 913         // Unlock the display
 914         //sdl_unlock_display();
 915
 916         return changed;
 917 }
 918
 919 /** Callback to allow override of the close method.
 920 */
 921
 922 static void consumer_close( mlt_consumer parent )
 923 {
 924         // Get the actual object
 925         consumer_sdl self = parent->child;
 926
 927         // Stop the consumer
 928         ///mlt_consumer_stop( parent );
 929
 930         // Now clean up the rest
 931         mlt_consumer_close( parent );
 932
 933         // Close the queue
 934         mlt_deque_close( self->queue );
 935
 936         // Destroy mutexes
 937         pthread_mutex_destroy( &self->audio_mutex );
 938         pthread_cond_destroy( &self->audio_cond );
 939
 940         // Finally clean up this
 941         free( self );
 942 }